Power-hammer



A KLINGBACKL POWER HAMMER. APPLICATION FILED APR.25. 1917.

' PatentedSept. 21,1921

, 2 SHEETS-SHEET 1- Quanta A. KLINGBACK.

POWER HAMMER. APPLICATION. men, APR. 25. 1911.

Patented Sept. 21,1920.

'2 SHEETS-SHEET 2.

fl. X0 60 UNITED. STATES.

ADAM .KLINGBACK, or nivnvrnrr, IDAHO.

L ENT OFF ICE.

POWER-HAMMER.

Specification of Letters Patent.

Patented Sept. 21.1920.

Application filed April 25, 1917. Serial No. 164,471.

This invention is an improvement in power hammers and has particularreference to a foot operated mechanism for actuating the hammer.

An object of the invention is to provide an improved mechanism forobtaining the greatest amount of force to the blow of the hammer by, theapplication of the least'amount of power and, to this end, use is madeofa plurality of simultaneously operated rocking members to one of whichis connected a hammer supporting member actuated by the movement of saidrocking members.

Another object is the provision of an improved mounting for the hammerin the supporting member therefor whereby the head thereof may bereversed and said hammer removed when desired.

A further object isthe provision of a device of this character which issimple in construction, easy to manufacture and effective in carryingout the purpose for which itis designed. I v i The inventive ideainvolved is capable of receiving a variety of mechanical expressions,one of which, for the purpose of illus-' trating the invention, is shownin the accompanying drawings wherein Figure 1 is a side elevation of thedevice constructed in accordance with the invention and showing thehammer in normal or inoperative position.

Fig.2 is a similar view showing the parts in the position assumed at theconclusion of the striking movement of the hammer.

' Fig. 3 is a front elevation of the device.

Fig. 4 is a rear elevation thereof.

.Fig. 5 is a bottom plan view.

Fig. 6 is a vertical longitudinal section. Fig. 7 is, a section on theline 7 7 of Fig. 8. Y I

Fig. 8 is a section on the line 8 8 of The invention is illustrated, inthe accom panying' drawings, in what is now believed operator.

to be its preferred form and comprises a main frame consisting of arectangular base 10 having an anvil 11 secured at one "end thereof andprovided adjacent its base with a vertical slot 12, the purpose of whichwill later appear. The sides of the frame preferably consist of frontand rear uprights 13 and 14: respectively, arranged in convergingrelation and connected at their upper ends by the cross pieces 15..

A plurality of rocking members, 16, '17

an'd18 are disposed one above another between the sides of the mainframe and are pivoted at their outer ends therein alternately or instaggered relation, each member. consisting of a'substantially U-shapedframe. The lowermost'frame 16 has'its ends pivoted at 19 adjacentthe'lower ends of the rear uprights 1 1 and said frame is provided uponits forward end with an extension 20 terminat-v ing in apedal 21 whichprojects :through and beyond the slot 12 in the anvil whereby the samemay be readily depressed by the The next superposed or intermediateframe 17 has its ends secured to a shaft 22 rotatably mounted inthefront uprights 13 and the sides of said frame 17 are connectedintermediate their ends to the .in

termediate portions of the sides of the frame 16 by links 23 so that arocking movement, imparted to the lower frame 16 will preferably mountedbetween the sides of 1 the main frame and journaled for oscillaa torymovement in the cross pieces 15 and connected to said supporting memberare adjacent ends ofnormally closed helical or coil springs 27 whichextend in diverging relation and have their other ends connect- 'ed'tothe bi ht portionof the upper rocking 1 frame '18. 'Trom the foregoingdescription it will be apparent that when the foot pedal 21 is depressedthe frames 16,17 and 18 will be simultaneously rockedabout their pivotsand through the springs 27 the supporting member26 will be oscillated.When said supporting memberis returned to its normal position, in amanner to presently 3O samewill, through the-link 31, pull the appear,the momentum thereof will, after the frame 18 has reached its uppermostlimit, expand said springs until such m0- mentum is overcome. Thereforethe subsequent contraction of the springs will increase the initialmomentum of the hammer supporting member at the beginning of its nextdownward or power stroke thus making it possible for the operator todepress the pedal with the least amount of exertion.

The mechanism for returning the hammer supporting member 26 to itsnormal position preferably comprises an oscillatory lever 28 secured,intermediate its ends, to a shaft'29 journaled in the uprights 14 adjacent the shaft 24 and the upper end of said lever is connected to saidmember 26 by a link 31. iThe lower end of said lever has one end of alink 30 secured thereto, the other end of which is connected to a rod or'bar 33 having a plurality of openings 34 therein, any one of which isadapted to receive one end of a large coil spring 35 the other end ofwhich is secured to the base of the anvil 11. The purpose of the severalopenings 34 in the rod 33 is to permit of regulating the tension of thespring35 when desired. It will be apparent that when the foot pedal 21is depressed and the supporting member 26 makes a power stroke the upperend of the lever 28 forwardly and thus expand the spring 35 so that uponthe release of pressure upon the foot pedal said spring will retract andcause the supporting member 26 to return to its normal position at whichtime the expansion of the coil springs 27 occurs, as previouslydescribed.

Thehammer head is of any suitable construction and has its'handle orhelve 36 mounted in a socket 37 in the member 26, each end of saidsocket being provided with ring members 38 and 39, the former havingoppositely disposed notches .40 therein for normally receiving the endsof a transverse V pin 41 carried by the inner end of the handle of saidhammer. This pin 41 is normally sure upon said handle. The ring member39 at the upper end of the socket is provided with a semi-circular slot43 the upper edge of which is provided at its ends with notches orrecesses v44 which normally receive the transverse pin 45 also carriedby the handle of the hammer so that when said handle is in normalposition the same will be prevented from returning relative to thesupporting member or, in other words,

relative to the longitudinal axis of said However, should it be desiredto socket. reverse the head of the hammer, it is only necessary todepress the handle against the tension of the spring 42until th'evpins41 the spring 42 will then force the and 45 are disengaged from theirrespective notches, after which said handle may be engage theirrespective notches. It will be readily apparent that by withdrawing. thepins 41 and 45 the hammer may be removed and replaced.

What is claimed is 1. In a power hammer the combination of a mam frame,a hammer support pivoted therein, a hammer carried thereby, a pedal alsopivoted in said main frame, a plurality of rocking frames supported bysaid main frame and connected to each other and to the pedal and supportto transmit a power stroke to the hammer, means connected to saidsupport for returning the same to normal position after the conclusionof said power stroke, and a normally contracted spring between saidsupport and one of said rocking frames yielding at the conclusion of onestroke and then contracting to increase the efiiciency of the next.

2. In a power hammer, the combination of a main frame, a hammersupporting member mounted for oscillation therein, a

hammer carried thereby, and a plurality of rocking frames arranged insuperposed re lation, pivoted at their outer ends to said main frameandprojecting alternately inward from their pivots, the frames beingconnected with each other and to said supporting member whereby tooperate the same to transmit a power stroke to said hammer.

3. In a power hammer, the combination of a main frame, a hammersupporting member mounted for oscillation therein, a hammer carriedthereby, an oscillatory lever carried by said main frame and connectedat one end to said supporting member, resilient means connected to theother end of said.

increasing the initial momentum. of the,

former at the beginning of a power stroke.

4. In a power hammer, the combination of a, main frame, a hammersupporting mem-' ber mounted for oscillation therein,a hammercarried-thereby, an oscillatory lever carried by said main frame andconnected at one end .to said supporting member; resilient meansconnected tothe other endofsaid lever for returning said supportingmember to normal position at the conclusion of a power stroke of S2116;hammer, and ,coil springs connected to said supporting member forincreasingthe initialrnomentum of the former at the beginning of a powerstroke.

5. In a power hammer, the combination of a main frame, a hammersupporting member mounted for oscillation therein, a hammer carriedthereby, a plurality of rocking frames disposed one above another andhaving their outer ends alternately pivoted to said main frame, saidframes being connected to each other and the uppermost connected to saidsupporting member whereby to operate the same to transmit a power stroketo the hammer, and a pedal carried by the lowermost of said frames forrocking the same to impart a similar motion to the other frames.

6. In a power hammer, the combination of an oscillatory hammersupporting member having a socket, a hammer whose helve has one endrotatably mounted therein whereby the hammer head may be reversed, ringmembers carried by said supporting member and having notches therein,and pins carried by said hammer and normally engaging said notches toprevent rotary movement of said hammer.

7. a power hammer, the combination of.

. said hammer for yieldably resisting said longitudinal movementandnormally preventing said rotary movement.

8. In a power hammer, the combination of an oscillatorysupporting'mem'ber having a socket, a hammer whose helve has one endmounted in said socket and movable rotatably and longitudinally thereinto permit of said rotation, said member having notches and said helvehaving pins, and a spring in saidsocket holding said notches and pins inengagement for resisting said longitudinal movement and normallypreventing said rotary movement.

In testimony whereof, I aflix my signature in the presence of twowitnesses.

ADAM KLINGBACK. Witnesses:

R. E. ROSE, J. L. REYNOLDS.

